NorthStar 8000i System Operation Manual page 147

Adjust Range then use the up/down keys or the rotary knob to
move the outer edge of the radar guard zone closer to, or further
from, your vessel. Select OK to confirm the new setting.
Adjust Bearing then use the up/down keys or the rotary knob
to move the entire guard zone to port or starboard, one degree at a
time. Select OK to confirm the new setting.
Adjust Depth then use the up/down keys or the rotary knob to
move the inner boundary line of the guard zone closer to, or
further from, your vessel. Select OK to confirm the new setting.
Adjust Width then use the up/down keys or the rotary knob to
increase or decrease the angular width of the guard zone (this
won't work if you've chosen a circular guard zone). Select OK to
confirm the new setting.
Alarm When then toggle between Enter Zone or Exit Zone to
specify when a target will trigger the radar guard zone alarm. Enter
Zone is the default. (Also see "Set the sensitivity of the guard zone
alarm").
5. Any changes are made immediately, but the radar guard zone alarm is
suppressed for ten seconds.
6. When you are finished, select Return.
Northstar 8000i Operation Manual
147